Re: Gigabyte GA-X48-DS5 - Bios backup checksum error
The only time I have seen a CMOS checksum error is with a dead CMOS battery.
My old IBM R40e would kick up that message every time I powered up. I'd have to go into the BIOS and set the Date/Time, LCD settings etc then save and exit. Upon every fresh cold boot all BIOS settings would be lost.
I'd start by removing then re-seating the CMOS battery after first clearing the CMOS using the pins on the board. If that doesn't work, a replacement battery would be worth trying. You should be able to use one from another board if you have a spare, or if not any electronics shop should be able to get you one. It's just a standard Lithium button cell, so if you take the battery to them or write down the code number, they can give you the correct type.
Coolermaster CM 690 II advance Case
Corsair HX750 (CWT, 91%(80+ Gold rated @230V) single 62A 12V rail
P55A-UD4 v2.0 @ F14
Core i5 760 @ 20 x 201, 4.02GHz
TRUE Black with a single Noctua NF-P12 pumping out 55 CFM @ 19db .
2 x 2GB Mushkin Ridgeback (996902), @ 7-10-8-27, 2010-DDR, 1.66v
2 x Gigabyte GTX 460 1024MB in SLI (Pre OC'd to 715MHz core and 1800MHz VRAM) @ 850 Core / 4100 Mem.
Intel X25-M Boot Drive (OS and Programs) 200MB/s Read & 90MB/s Write
Corsair X32 200MB/s Read & 100MB/s Write
WD Caviar Blue 640GB C (Steam, Games, Storage, Temp Files & Folders, etc)
Samsung F3 500GB Backup/Images
Noctua 1300RPM 19dB case fan (rear extraction)
3 x 140 MM Coolermaster LED fans (one front intake, one top extraction, one side intake)
Dell Ultra Sharp 2209WAf E-IPS @ 1680x1050